Improvement in plows



0; SPARKS.

v wheel Plowr No. 30,892. Paterited Dec fl, 1860.

- N. PETERS, PHOTO-LITMOGRAFNER. WASHINGTON D C PATENT ()FFICE.

OLIVER SPARKS, OF SHELBINA, MISSOURI.

IMPROVEMENT IN PLOWS.

Specification forming part of Letters Patent No. 30,892, datedDecember'll, 1860,

To all whom it may concern:

Be it known that I, OLIVER SPARKS, of Shelbina, in the county of Shelbyand State of Missouri, haveinveuted a new and Improved Trench-Plow; andI do hereby declare that the following is a full,clear, and exactdescription thereof, reference being bad tothe accompanying drawings,making a part of this specification, in which- Figure 1 is aside'elevat-ion of theimproved trenching-machine. Fig. 2 is a plan viewof the machine with a section taken through the horizontal planeindicated in Fig. 1 by the red line 00 00.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention is an improvementin trenchplo'ws.

It consists in combining in a novel manner -a breaking or sod plow witha trench or subsoil plow, whereby both plows may be thrown into or outof the ground simultaneously.

The principal object of the invention is to more perfectly bring thesubsoil to the surface and cover up the sods or surface-soil, as will behereinafter described and represented.

To enable'those skilled in the art to fully understand my invention, Iwill proceed to describe its construction and operation.

In the drawings, A is the mold-board of an ordinary turn-plow. B is itsstandard for attaching it to the beam B; and a is the landside-bar, fromwhich proceeds perpendicularly upward the guide-bars b b, whichare'carried above the rear end of beam B, bent over, and attachedsecurely to the beam each side, and braced by plates 0, Fig. 1.

In front of the turn-plow is placed a rotary colter, (1, attached to thefoot of standard 0, and in front of this colter are two wheels on anaxle-tree, D, on which the front end of the machine rests. One of thewheels is made of a larger diameter than the other, as one runs in thefurrows and the other on the unplowed land.

E E are standards which project up from the axle-tree D and support oneend of the long hand-lever F and the lever G, to which the front end ofthe beam B is jointed.

E E are standards attached to and projecting up above the beam B, towhich thelever F may be secured by a pin or other means when it is in anelevated or in a depressed state. The lever G has a slot out in its endin a direction with its length, and through this slot passes a pin thatpivots the lever to a pendentrod, G, which is attached to the hand-leverF.

H is a slotted lever, the slotted end of which is attached by the samepivot to the pendent G and to the lever G. This lever H has its fulcrumin the standard E E, and its other' man who manages the trench-plow. Itsobject is to enable the plowman to elevatethe points of both plows atthe same time or 'to depress both points simultaneously. He may by thismeans regulate thedepthit is desired theplows should run in the ground.The front plow runs sufficiently deep to cut and turn the sod or surfacesoil. The rear plow then follows in its furrow and brings up the subsoiland turns it over the sod which has been previouslyturned,

.thus completely turning the soil and burying the surface-sod.

Having thus described my iuvention,\vhat I claim as new, and desire tosecure by Letters Patent, is

The two plows arranged one in front of the other, as and for thepurposes herein set forth, in combination with the levers F, G, H, andG,

arranged, supported, and operating as herein described.

OLIVER SPARKS.

Witnesses O. R. WHITEHEAD, SAMUEL G. HENINGER.

